4 ft. Green Berm Filter: This rugged berm can be used  in front of storm drains, catch basins or around contruction sites.  Best example is it is like a waddle except it filters pollutants in the water. It is used for construction BMP's Best Management Practices and Compliance of the Clean Water Act. You will be able to prevent trash and pollutants from entering the strom drain system.  Most of our contractors use it like a trash interceptor that cleans the water prior to recovery.